I disagree. There's a big difference between "users" and active, engaged users. Google+ may have had a lot of users on paper, but relatively few people actuall

I disagree. There's a big difference between "users" and active, engaged users. Google+ may have had a lot of users on paper, but relatively few people actually spent much time using it. The hard part about building a social network for a company like Google, or even Yahoo, isn't getting user accounts. It's making something that people actually want to use.